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Diffstat (limited to 'embeddedobj/test/Container1/NativeView.java')
-rw-r--r-- | embeddedobj/test/Container1/NativeView.java | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/embeddedobj/test/Container1/NativeView.java b/embeddedobj/test/Container1/NativeView.java new file mode 100644 index 000000000000..03968fa01fe4 --- /dev/null +++ b/embeddedobj/test/Container1/NativeView.java @@ -0,0 +1,180 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2008 by Sun Microsystems, Inc. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: NativeView.java,v $ + * $Revision: 1.4 $ + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + *************************************************************************/ +package embeddedobj.test; + +// __________ Imports __________ + +import java.awt.*; +import java.lang.*; +import java.awt.event.*; + +// __________ Implementation __________ + +/** + * Class to pass the system window handle to the OpenOffice.org toolkit. + * It use special JNI methods to get the system handle of used java window. + * + * Attention! + * Use JNI functions on already visible canvas objects only! + * Otherwise they can make some trouble. + * + * @author Andreas Schlüns + * @created 22.02.2002 08:47 + */ + +public class NativeView extends java.awt.Canvas +{ + // ____________________ + + /** + * ctor + * Does nothing realy. + * We can use our JNI mechanism for an already visible + * canvas only. So we overload the method for showing ( "setVisible()" ) + * and make our intialization there. BUt we try to show an empty clean + * window till there. + */ + public NativeView() + { + maHandle = null; + maSystem = 0; + this.setBackground( Color.white ); + } + + // ____________________ + + /** + * Overload this method to make neccessary initializations here. + * ( e.g. get the window handle and neccessary system informations ) + * + * Why here? + * Because the handle seams to be available for already visible windows + * only. So it's the best place to get it. Special helper method + * can be called more then ones - but call native code one times only + * and safe the handle and the system type on our members maHandle/maSystem! + */ + public void setVisible( boolean bState ) + { + getHWND(); + } + + // ____________________ + + /** + * to guarantee right resize handling inside a swing container + * ( e.g. JSplitPane ) we must provide some informations about our + * prefered/minimum and maximum size. + */ + public Dimension getPreferredSize() + { + return new Dimension( 800, 600 ); + } + + public Dimension getMaximumSize() + { + return new Dimension( 1024, 768 ); + } + + public Dimension getMinimumSize() + { + return new Dimension( 300, 300 ); + } + + // ____________________ + + /** + * overload paint routine to show provide against + * repaint errors if no office view is realy plugged + * into this canvas. + * If handle is present - we shouldn't paint anything further. + * May the remote window is already plugged. In such case we + * shouldn't paint it over. + */ + public void paint( Graphics aGraphic ) + { + if( maHandle == null ) + { + Dimension aSize = getSize(); + aGraphic.clearRect( 0, 0, aSize.width, aSize.height ); + } + } + + // ____________________ + + /** + * JNI interface of this class + * These two methods are implemented by using JNI mechanismen. + * The will be used to get the platform dependent window handle + * of a java awt canvas. This handle can be used to create an office + * window as direct child of it. So it's possible to plug Office + * windows in a java UI container. + * + * Note: + * Native code for windows register special function pointer to handle + * window messages ... But if it doesn't check for an already registered + * instance of this handler it will do it twice and produce a stack overflow + * because such method call herself in a never ending loop ... + * So we try to use the JNI code one times only and safe already getted + * informations inside this class. + */ + public native int getNativeWindowSystemType(); + private native long getNativeWindow(); // private! => use getHWND() with cache mechanism! + + public Integer getHWND() + { + if( maHandle == null ) + { + maHandle = new Integer( (int )getNativeWindow() ); + maSystem = getNativeWindowSystemType(); + } + return maHandle; + } + + // ____________________ + + /** + * for using of the JNI methods it's neccessary to load + * system library which exports it. + */ + static + { + System.loadLibrary( "nativeview" ); + } + + // ____________________ + + /** + * @member maHandle system window handle + * @member maSystem info about currently used platform + */ + public Integer maHandle ; + public int maSystem ; +} + |